John g



J. G. PETTIS.

REGULATING VALVE.

APPLICATIQN FILED AUGJ. |914. nENEwEn lum-j 19 |919.

1 ,3 1 4, 698 Patented Sept. 2, 1919.

I UNITED STATES PATENT OFFICE.

JOHN G. PETTIS, OF CHICAGO, ILLINOIS, ASSIGNOB. TO THE IMPERIAL BRASS MANU- FACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

REGULATING-AVALVE.

Specification of Letters Patent.

Patented Sept. 2, 1919.

i Application iiled August 7, 1914, Serial No. 855,641. Renewed .Tune 19, 1919. Serial No. 305,393.

To 1U 'rr/1.0m. t Imay concern 15e it known that I, JOHN G. PE'rTIs, a citizenl of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Regulating-Valves, of which the following is a ful1,-clear, and exact description.

My invention relates to diaphragm controlled valves for',1'egulatin, r` the pressure of gases and fluids, and its object is to produce a valve having a comparatively simple construction that will enable the valve to automatically "close should its diaphragm, whose expansion and contraction regulates the pressure, break or otherwise become inoperative. This I accomplish by the means hereinafter fully described, and as particularly pointed out in the claims.

Inl the drawings:

Figure 1 is a plan view of a regulating valve embodying my invention.

Fig. 2 is a central section taken on dottedl line 2 2, Fig. 1.

The casing of my invention comprises an inverted cupeshaped upper section A, and an inverted bell-shaped lower section B. The upper section has its annular edge a flanged outward and a flexible metal diaphragm C is stretched across 'the mouth of said upper section and ig brazed or otherwise secured to the underside of the flange, and, preferably, its margins are bent upward and lap against the perimeter of said flange a.

The lower section B of the casing has a flanged edge b, which latter has an upturned rim, and the inner diameter of this rim is such that when the edges of the upper and lower sections of the casing are fitted together said rimrwill lap against andl inclose the outer circumference of flange a.

The bottom of the lower section is inclined downward toward the center where it is provided with .a downwardly extending well or tube D, the lowerend of which is reduced and provided with a screw-threaded opening, which latter is engaged by the axially extending gage-screw c. The lower end of this screw is, preferably, provided with a cross-bar d passing transaxially through it to assist in turning the same, and the upper end thereof is seated in a central concavity in the lower side of a circular shaped head e, which latter has a concentric annular flange on which the lower end of a' comparatively stiff expansion coil spring E is seated. If ,desir-ed, I can seat double springs thereon, as shown in Fig. 2 of the drawings.

Spring E has its end opposite head e bearing upward against a circular plate or .arbor F secured centrally to the lower surface of the4 diaphragm, and this arbor has a centering stud f that enters the bore of the adjacent end of said spring and prevents lateral displacement, thereof.

Secured concentrically to the upper side of the diaphragm is the lower disk-shaped head g of a'valve spindle G, a spring M reacts between the upper section A' and the head g. A tubular extension or pipe H extends centrally from the top of the upper sectionA of the casing, and the spindle of said valve extends axially up through said pipe H a suitable distance, substantially as shown in the drawings. The bore of `.pipe II next the bell of said upper section is reduced in diameter by a suita le bushing h that is made integral with the pipe, and above this a cylindrical valve-seat I made of rubber or other suitable material is inserted and secured in place, and'compressed against the upperside of bushing h by an exteriorly threaded gland-nut J screwed into the bore of the pipe, as shown in the drawings.

The underside of said gland-nut is hollowed out or recessed concentrically to provide a valve-chamber K, and the reduced bores of the bushing h, the valve-seat I and the gland-nut'J, preferably, correspond and are concentric to the axis of the pipe H and to the valve spindle G, which latter is provided with an integral concentric coneshaped collar or valve-bod proper la at the point where it exten s through the chamber K. The inclined sides of this valve k are undermost, and the bores of the bushing, the valve-seat and the gland-nut are, preferably, of such a, diameter as to leave a space of about one-sixteenth of an inch between the valve-spindle and. the walls of the bore.

lThe upward pressure of spring E is such as yto keep valve k pressing upward against the upper valve-seat in gland-nut J, but not sufficient to resist the full pressure of the gas or fluid pressure entering the upper end of pipe H, which latter is suitably-connected with a suitable source of gas or liquid under pressure, and when the gas or liquid is turned into the casing it flows through the bores of the gland-nut, the valve-seat and the bushing into the chamber inclosed by the bell of the upper -section which it fills and presses against the diaphragm. This pressure expands or presses the diaphragm downward, and the valve 7c correspondingly moves to close or regulate the flow through the lower end or mouth of the valve-seat, and regulates the flow through Athe valve casing and out of the discharge-pipe L thereof leading from the side of the cup according to tlieadjustment of the gage-screw c, and the opposing pressure of the expansion spring E against the lower side of the diaphragm. If desired two discharge-pipes may be attached a-t different pointsto the upper bell-shaped section, as shown in Fig. 1. y

If desired,a suitable pressure-gage may be connected'to pipe H above the gland-nut in order to inform the observer what the pressure from the source of the gas or liquid is, and a similar gage may be connected to the V` cup to enable him to see what the reduced pressure is. These gages may, however, be dispensed with, if desired.

What I claim' as new is l. In a regulating valve, a casing composed of separable sections, one of said sections having al tubular inlet portion, a diaphragm arrangedl between said sections, a spindle having one end provided with a valye arranged in said inlet portion and having its oppositefen'd secured to the diaphragm, a valve-seat with which said valve coperates, a removable member being bored to receive said valve and the end of said spindle; and'said first mentioned removable member Ibeing also' provided with a valve seat and being adjustable with relation to said valve-seat.V

2. In a regulating Valve, a casing composed of separable sections; one of saidxseetions having a tubular inlet portion, a diaphragm arranged between the sections, a spindle extending from said diaphragm and carrying a valve which closes at both limits of its movement and is arranged in said tubular inlet portion, a valve-seat with which said valve coacts, a removable member' arranged above the valve andprovided with a Valve-seat; said member being bored to receive the end of the spindle and said valve, and the bore in which the valve operates be- I ing larger than the bore which receives the spindle, and said member being adjustable with relation to the first mentioned valveseat. l

3. In a regulatinglvalve, af.| casing having a bell-shaped upper section and a tapering lower section, a tubular inlet extending axially from the dome of the bell-shaped upper section, a diaphragm supported between the sections, a tubular extension depending from the tapering lower section, removable valveseats and valve-chamber in the bore of the tubular inlet and arranged to be removed.

section, a diaphragm supported between the sections, a tubular extension depending from the tapering lower section, a valve-seat in the bore of the tubular inlet, a spindle extending up from the diaphragm and carry? ing a valve coacting with the valve-seat, duplex springs arranged in the tubular extension, and a spiral spring in thebell-shaped section surrounding the spindle and interposed between theJ dome and the diaphragm.

In witness whereof I have hereunto set my hand this 30th day of July, 1914.

JOHN G. PE'ITIS.

Witness FLORENCE MITCHELL. 

